Pump for internal-combustion engines



Feb. 24, 1931. A, MQQRHQUSE 1,794,088

PUMP FOR INTERNAL coMBUS-TION ENGINES Filed Nov. 16, 1927 Unire STATESPAT ALFRED Moonnousn, or nn'inoir, it

COMPANY, or niiiiiorr, iii

This invention relates to internal combustion engines and moreparticularly to pump mechanism for supplying fuel thereto. v

In motor vehicles employing internal com- Patentea Een. 24, iesi PUMPFOR ITERIAL-COMIBUSTION ENGINES Appiication inea November ie, ies?.serial no. 233,548.

FUNE- iciiieiin, .essisieen kronieken-ii iviofron can rcriienixi, iiconroniirion or iiiciiieaii nection with the drawings, which form a partof this specification and lin which:

Fig. l is a side elevationof an internal combustion engine and vacuumtank illusbustion engines as a. source of motive power, trating myimproved pump mounted upon motor, for raising fuel from the supply tankhQIeOIl, and

An objectof the invention is to provide a l Vaguum punp Operated fromthe Camshaft 111g Cl'tnkCtSe lll-Ylllg HlOlllltGtl lllelll ZL camshaft12. A cylinder block 13 is sup- Anotner 'Object of the invention is t@proported by the crankcase and provided with a vide a. vacuum pumpcomprising but few One of the best known means for this purpose is avacuum tank assisted by a vacuum pump driven from the to the carburetor.

of an internal combustion engine.

manifold 14 from which gine carburetor, Fig. 2 is a vertical sectionalView of a portlie fuel supply tank for the motor is frethe engine andcnnnected to the vtank and quently arranged at a point lower than thethe mixing 'tube or the en motor carburetor necessitating the employmentof a means, preferably Operated 'by the tion of a crankcase with thepump mounted Fig. 3 is a vertical sectional view taken substantially online 3 3 of Fig. 2.

Referring to the drawings for more details of the invention, 1() represserally, an internal combustion en specific L nts gengine includissuspended a carparts of Simple Structure arranged in n comburetor 15.The carburetor receives its fuel will occupy but little space.

A still further object of my invention is to provide a vacuum pump whichhas the advantages of av positive action, highly efficient in OPSIOIl,21nd yet 0f marked Simplicity at 27 to provide a suitable support for aguide as a whole and in respect to each of its component parts so thatits manufacture is ecoafter described, nomically facilitated both asregards parts and their assembly.

Other objects of the invention will appear provide suitable lubricatingpassages'and is from the following provided at one end With a radialflange 3l v description taken in Lconand the vacuum tank receivesthrough a pipe line 18 leading fr supply tank, not shown. may be of anvwell known t eral use on motor vehicle the motor carburetor, so that gafed by gravity from the vacuum tank to the prises a fdisk 21, the perishouldered as indicated pact and unique manner, so that the pump SUPPIYthrough L P1P? une. 16 leading fom a vacuum tank 17 suitably supportedin a Another Object of the invention is to pr@ position adjacent to andabove the engine vide a vacuum pump in which a guide member for thepiston rod is supported between the pump casing and the cylinder.

Another object of the invention is to provide a. vacuum pump having aeasing with means for mounting the same upon the crankf'om the mamSupply 3o case of an internal combustion engine and to construct thecasing in such a manner that it will provide a suitable housing fortheCarburetor operating means of the pump and a suitable support for thepump proper. I

Another object of the invention is to pro- U 20 L. Q 1 th n vide avacuum pump having a piston Vwhich a' msm@ i SOWD e C is simple inconstruction, eflicient in `operation and which will not score thecylinder its supply om the main The vacuum tank ype, now in gens, forraising gasoline tank to ailevel above soline may be YOneend of theciankcase is apertured as indicated at 19 in axial alinenient with thecamshaft 12A 'and mounted in the aperture is v sing 2O comphery of whichis atl 22 to lit snugly in the aperture. This disk is secured in posi-The guide member 28 has a substanti tion by rivets 23 or suitable meansVand has formed integral therewith a central sleeve portion 24terminating in a bend or elbow 25 flanged as indicated at 26 andshouldered as member 28 and a cylinder 29 to be hereinally cylindricalbody portion apertured as at to adapted to bear upon the flange 26 and adepending lip or flange 31 adapted to engage the shoulder 27, the`flange 31 being shouldered as indicated at 32, the object of whichwillhereinafter appear. The other end o'lthe guide member has an internalshoulder portion supporting adepending integral sleeve 34 positionedaxiallywithin the body portion and extending substantially therethrough,the upper end of the-sleeve' being iared as indicated at 85 to providealubricant reservoir.

The cylinder 29 has a liange 36 bearing upon the shoulder 32 of theguidek member 28 and secured by suitable means, not shown, to the flange26 oie the casing 2O with the radial Harige/31 on the guide memberQSinterposed. The cylinder 29 is closed at theatopxasindicated at 37 andprovided with an interior circum'erentialY groove 38. On the top ot thecylinder is a boss 39, boredv and thread d to receive a plug 40, thebo-re communicating with theV cylinder by means of a port 41.v JLne plug,40 has an axial bore 42and an enlarged axial counter bore 43 in whichis mounted a ball 44 adapted to close the port 41. Connected to theplug40 by a suitable connection 45 -is a pipe line46, leading to themining chamber of the carburetor 15;

Formed upon the wall of the cylinder 9 at the upper end thereof is aboss 47 having a bore 48 threaded to receive a nipple 49and a bore 50normal to the bore 48 and communicating therewith by means of a port'51. The bore 50 is threaded to receive plug 52 and has a port 53communicating with the Circurn erential groove 38 inthe top of thecylinder. The plug 52 is recessed to receive aball 54 adapted to closethe port 53 andthe nipple 49 is connected :by means of a suitableconnection 55 to a pipe line 56 leading to the top o'l the Yvacuum tank17.

As shown, the forward end or' the camshaft is threaded to receive anextensionl member 57 secured in a fixed position by a pin 58. Thisextension member projects intotl-ie casing 2O and is provided npon itsfreezend'with a cam 59. Mounted in the cylinder 29 is a piston 60 havinga head 61 and a skirt portion 62, the bottom edge ot which is curvedinwardly as indicated at 63 to provide a strengthening rib and toprovide mea-ns preventing scoring oit the'cylinder wall.

Connected to the head lportion of the piston by a plate 64 is a pistonrod 65`having a head 66 seated in a depression 67 in the plate 64 andbearing upon the piston head. The piston rod is mounted to reciprocatein the sleeve 34 and has upon its lower'end a thimble 68 having a radialflange 69 which provides an abutment for one end ota coiled spring 70mounted upon the sleeve 34 `with its other end bearing against tileshoulder The spring 70 serves to normally hold the thimble 68 inengagement with the extension of a vacuum-inthe vacuuin-'tankto raisethe y fuel from the supply, tank to the vacuum tank from which'it is fedby gravity to the carburetor andat the same time modifying the mixturein the mixing chamber according tothe speed of theengine:

It is to be understood that theform of! the Y invention herein shown;and described: is Vto `be taken as the preferred exampleaofwthc same andthat various changes vinV shape, sine and arrangement cliparts mayberesortedI to Without departing from-th spirit'oif the iniventionvor thescopeof the subjoined claims.

Having, thus described the"` various ea1- tures of Vmy invention what Icla'nn asnew and desire top rocure by Letters'Patent is :v

'1. In 'a pump mechanism', the Vcombination of'a two partfcasing,azguide'-meniberwinterlocking said parts, the guide portion `of saidmember extending'in spaced telescopic relationfwith one part of the'casingyafpistonirod mounted in said guide member and a piston ini the:casing Ypart telescopingithe guide carried by Vsaidzrod:U

2.', In: a pump mechanism", the combinaticn of casing,"a*guide lmembertelescoping the casing, a cylinder telescopingf' the guide member, apistonisrod mounted: iin' the f guide member Aand a piston'inifthevcylinder telescoping the guide member.

3. In a pnmp'mech'anism, thecombinatio'n of a :casingfhavin'gasupporting `flange' and an opening, a guide member positioned over the1 opening: y'having a part'litted ther-einen cylinder z over the guide'f1nember,l means for securing. the cylinder' andl casi-ng togetherwithf the guidei member. securedv betweem a piston'A rod.' mountedl to,reciprocate =in1- the guide member anda piston carried by 4the'rod andtelescoping aiportionof .theguide memberl in the f cylinder.`

4. In a pnmpmechanism the combination with a casingof a pistonstructurecomprising a head and a skirt portion, a reinforcing platesecured to the head portion ofthe piston for rotatablyv attaching apiston rod.

5. vIn a.p ump mechanism, the combination with a casing, of a .pistoncomprising a head and a skirt-portion, aninturnedl flange on the bottomof vthe skirt portion', aA reinforcing plate on the head portion', saidyreinforcing plate-having a depress-ion with. an aperture therein, apiston rod extending through the-aperture inthe plate and 'ahead on'`the rodi, litting. into the= depression inf the plate.

6. A pump element comprising a guide member having a radial supportingflange and an inturned shoulder portion and ay sleeve depending from theshoulder portion and flared at its upper end to provide an oilreservoir.

7. A pump element comprising a guide member having a supporting flangeand an interior sleeve, the walls of the guide member being slotted toprovide lubricating passages.

8. A pump clement comprising a guide member having on one end thereof aradial flange and a depending lip for supporting the guide member, aninturned shoulder on the other end of the guide member and an internalsleeve depending from said shoulder.

9. A pump element comprising a guide member having formed upon one endthereof a radial flange and a depending lip for supporting said member',an inturned shoulder on the' other end of the guide member having` adepression therein, a sleeve formed integral with the shoulder anddepending therefrom and communicating with the depression.

10. A pump element comprising guide member having on one end thereof ashouldered flange and a depending lip adapted to support the guidemember, the other end of the guide member having an inturned shoulderwith a sleeve integral therewith, said sleeve being positioned axiallywithin the guide member, said guide member having lubricating passagesin its wall and a lubricant collecting chamber in the top thereof.

11. In a pump mechanism, a casing having a supporting flange and anopening, a guide member .in said opening, said guide member having asubstantially cylindrical wall and a depending internal sleeve, acylinder mounted over said opening clamping said guide member on saidcasing, a piston rod mounted to reciprocate in the sleeve, a piston uponone end of the piston rod, a thimble upon Jthe other end of the rod anda spring upon the sleeve abutting said thimble.

12. In a pump mechanism, a casing having a supporting flange and anopening, a guide member mounted on said casing over the opening, aflange on the guide member engaging the opening, said guide memberhaving a hollow body portion supporting an internal sleeve, a cylindermounted upon the guide member and secured to the casing, a piston rodmounted in the sleeve, a piston on one end of the rod, a thimble on theother end of the rod, and a spring on the sleeve bearing upon saidthimble.

18. In a pump mechanism, a casing having a supporting flange and anopening, a guide member having a slip joint connection with the casing,a defending internal sleeve in the guide member, a piston rod mounted torevthecylinder, a piston rod mounted intheguide member, a piston on oneend of the rod and a thimble on the other end of the rod and a coilspring extending intermediate the guide member walls and pressingagainst the thimble.

15. In a pump mechanism, a casing having an opening therein, a guidemember mounted in said opening, an inturned shoulder on the guidemember, an internal sleeve supported by e the shoulder', the guidemember having lubricating slots in its side walls and a lubricatingreservoir in the top thereof, a cylinder enclosing the guide memberhaving intake and outlet ports, a piston rod mounted to reciprocate inthe sleeve, a piston on one end of the rod, a thimble on the other endof the rod, a spring wound upon the sleeve with its respective endsabutting the inturne'd shoulder and the thimble on the piston rodand acam coacting with the thimble for actuating the piston. Y

16. In an engine having a cranlrcase and cam shaft, a pump mechanismcomprising aY sectional casing secured to and in open communication withthe crankcase, a guide member intermediate the casing sections, a pistonin the casing section remote from the crankcase, and a piston rodprojecting through the guide member and actuated by the cam shaft, saidguide member having apertures therein to allow passage of lubricanttherethrough.

In testimony whereof I affix my signature.

ALFRED MOORHOUSIC.

